Rear dump wagon



1952 R. G. LE TOURNEAU 2,621,954

REAR DUMP WAGON Filed June 7. 1948 3 Sheets-Sheet 1 INVENTR. R, G, Le Tourneau Dec. 16,, 1952 R. G. LE TOURNEAU 2,521,964

REAR DUMP WAGON Filed June 7. 1948 5 Sheets-Sheet 3 IN V EN TOR.

Mimi:

Paienied Dec. 16, 1952 UNITED STATES N "i OFFICE REAR DUMP WAGON corporation of ;California Application lune 7, 1948, Serial.No. 31,509

3 C laims. (Cl. 293-19) This invention relateS.generaiiy to antomotiye p Wa o s, pe ia l r ea d m ty e One object *of the prescrit inyention;is ;to provide a rear m wago h vin a o el ;DQW! actuated lift assembly operatiye to swing the bow1 between a normaliy:1oweredtransportposi tien and a rearwardiy ti 1teddmnp position.

Another object of the inventidnis to provide a rear dump wagon, as in the precedinfg parag1aph, in which said power actuated lift assembiy comprises a simplified, yet ruggedand effective mechanism for the control of'the tiitable, rear dump bowl.

A further object of the invention is ;to provide a rear dump wagon wherein the .ti1table, rear dump bowl is directly ,wheglsupported ;from the ground, and conneted t o theiremainder of the implement by a straddietype draft ypi;e having arms disposedon,opposite sides of the bowl and pivoted thereto intermediate its ends and abcve the wheel axis;thepower lift assembiy for said bow1 comprising a heavi.duty control cable connected to thebc wi on the.nnder side adjacent its rear endandcentraiiy .of itssides, and. thence extending ;forwardiyand :npwardly ta connection With a reversible ele ctri c motel actuated winch unit mounted on the cross beam of the draft yoke with the cabie drum in ;a;central position on said bear n.

It is also an object of the inye ntion to provide a rear dump wagon which includes novei stop means to limit ti1ting, of the bow1 and pre- Vent its passing vertical dead center, which would be undesirable.

A further object of the invention is toprovide a rugged and reliabie rear dump wagon,; and one which wiil be exceedingiy effective-for the purpose for which it is designed.

These objects are accomplished by means of such structure and relative arrangement cf, parts as wii1 fuiiy appear by a perusai of the..iollowing specification and claims.

In the drawings:

Fig. 1 is a side elevation of .the rear .dump wagon in lowered transport position.

Fig. 2 is.a plan view of1the rear dump.wagon.

Fig. 3 is a side elevation,partly in. section, showing' the bowl ti1ted *to dump position.

Fig. 4 is a rear end view of the wheel-supported bowl of the wagon in lowered transport position.

Referring now more .partiniariy t the.:characters of reference on -thegdrawings, ti1erear dump wagon comprises a material carrying-bowl or body l open on top and gits-rear end; said bow1 l decreasing in widhgt, ts rear endportion by reason of lateraliy inward oisets 2, whereby pneumatic-tire rear wheels 3 can be disposed to pposite sides of th ebowi adjacent th e rear the aide, and the *latter in turn der-ives corne of itsstrength from the body.

The bow1 l is straddied frorn the front -b y a gener ally ,U-shaped draf;t ;yoke indicated generalIy at .6; such draft yo keinc1uding a;tublar iront crossbeam l having 'draft arnis 3 projecting rearwardiyiromomiosite erid'sthereof.

The tubuiar front cross Ibafii 7 is disposed ahead of the bow1 I and the draft arms }1 extendrearwardiy a1ong opposite sides of the bowl exteriorly thereof; said armsbeing cohnecte'd at their rear ends by;bail andsocktnhits 9'to CO1- responding sides of said bowl. The ball"and socket units *9 are disptxsed iritermediate the top and bottom'of the bowl andat a"point sOine istance ahead of the axisoi the'wheels 3.

The draft yoke 6 is' connected, cn traliy of beam E, by a coupling and pbWer steering unit l0 with the main case -of a tflxio-wheei tracter l2 which includes transversely 'spacedzneuiriatictire Wheeis l3.

.Ihe b owl l is adapted to be moved between its lowered transport position of Fig. 1fand its raised or ti1ted dumping position of Fign' 3 jby .means of the foliowing -power:actnated 1ift asin the c lear.

A heavy-duty controi c ablefl leads:-irom the cabie drum l6 downwardly under:the bowl l centra1ly of the sides of the latter,-to an anhr l.

on the bottom l9 of said bowl adjacentitSrear end.

Ahead of the anc hor i8 thebowl bottom 553 is arouate with the concave side -nppermost; ti 1is arcuate portion of the bowl being indicated at 20. Rearwardly cf the anchor l 8 theibcttdmi is generally Straight lengthwise, as at'2l, with such Straight portion at a rearwatd a'nd 1'1pward incline when the bjow1is in lowred-transzbrt position[ ThiSincliriation of the straightbottom portion 2! is for the pr'evention of rearend sp iliage whenthe bowl-is iniowered transport position and carrying matriai.

The heavy-duty control cable l1 extends from the cable drum l6 at a downward and rearward inclination to a point of substantial tangency with the arcuate bottom portion 20 of the bowl, and thence said cable extends along and conforms to said bottom portion up to the anchor I8.

With this arrangement, a positive and efiective tilting control of the bowl I can be accomplished, with the most effective leverage. It will be recognized that upon operation of the winch unit l in a direction to wind the control cable l1 onto the cable drum l6, the bowl is tilted upwardly at its front end about the ball and socket units 9 as an axis; the maximum leverage then being exerted so that a heavily loaded bowl can be raised without difficulty.

As the cable continues to run onto the drum, the bowl 1 is further tilted toward its discharge or dumping position; the normally forward portion of the bowl swinging upwardly and rearwardly, while the normally rearward portion of the bowl swings downwardly and forwardly, carrying the rear wheels 3 therewith. This causes an actual foreshortening of the implement, which is advantageous with respect to dumping operatiens.

The described power actuated lift assembly, including the winch unit I5, cable drum [6, and control cable 11, connected between said drum and the bowl bottom in the manner described, provides a simplified, yet more effective mechanism for the purpose than with any other known type of lifting mechanism; the leverage of said cable I1 with respect to tilting of the bowl being extremely effective without overloading the winch.

Another advantage of the described lift assembly is that it permits the bowl to be raised to a very high tilted or discharge position.

When the bowl reaches a predetermined position of maximum tilt, the following stop means comes into play to prevent the bowl from passing vertical dead-center:

The stop means comprises lengths of flexible cable 22 connected between anchors 23 on the sides of the bowl adjacent the front thereof, and other anchors 24 on the inner faces of the draft arms 8. The flexible stop cables 22 are normally slack, as in Fig. 1, but when the bowl approaches its position of maximum tilt, as in Fig. 3, the cables 22 become taut, limiting further tilting of said bowl and preventing its passage beyond vertical dead-center.

From the foregoing description it will be readily seen that there has been produced such a device as substantially fulfills the objects of the invention, as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described the invention, the following are claimed as new and useful, and upon which Letters Patent are desired:

1. A rear dump wagon comprising a body, a pair of transversely spaced wheels supporting the body intermediate its ends and about the axis of which the body is tiltable, a tractor mountec draft yoke including side arms projecting rearwardly from the tracter and pivoted at their rear end on the sides of the body at a point thereon well above the axis of tilting of the body, a winch-drum on the yoke ahead of the body and above the axis of tilting thereof, and a pull cable extending from the drum to a connection with the body at a point thereon such as to cause winding of the cable on the drum to lift and tilt the body rearwardly about said axis and at the saine time exert a forward pull on the wheels whereby the yoke arms are placed under compression and an additional backward tilting pressure is imparted to the body.

2. A rear dump wagon comprising a body, a pair of transversely spaced wheels having a relatively turnable axle extending therebetween on which the bottom of the body is secured at a point from its rear end a distance substantially the saine as the height of the wheel axis from the ground whereby to enable the body to be swung up rearwardly to a near-vertical position, a vertically swingahle tractor-mounted draft yoke including side arms projecting rearwardly from the tracter and pivoted on the sides of the body ahead of and above the axle, a pull cable connected to the bottom of the body at a point adjacent but ahead of the axle and extending thence forwardly and upwardly, and a winch on the yoke at the front of the body and including a drum about which the forward portion of the cable passes; the cable being disposed in contact with the bottom of the body to the front upper end of the same when the body is in a lowered carrying position whereby the body forwardly of the axis is cable-supported in such position and the winding of the cable on the drum imparts a lifting movement to the body.

3. A rear dump wagon comprising a body having an axle, a pair of transversely spaced wheels rotatably mounted on the axle, the body being tiltable about the axis of said wheels, a tracter mounted draft yoke including side arms projecting rearwardly from the tractor and pivoted at their rear ends on the sides of the body at a point thereon above the axis of tilting of the body, a power rotated drum on the yoke ahead of the body and above the axis of tilting thereof, and a pull cable connected between the drum and a point on the bottom of the body near said axle, part of the cable length being in contact with the lower surface of said body whereby the body is tilted upon rotation of the drum in 9. direction to exert a pull on the cable; the axle being integral with the body whereby said axle and body strengthen each other.

ROBERT G. LE TOURNEAU.

RFRENCES CITE!) The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 605,029 Taylor May 31, 1898 674,959 Carroll May 23, 1901 752,766 Exterkamp Feb. 23, 1904 818,737 Brooks Apr. 24, 1906 1,344,100 Tait June 22, 1920 1,364,586 Sale Jan. 4, 1921 1,770,086 Phaneuf July 8, 1930 2,131,326 Kaster Sept. 27, 1938 2,360,823 Austin Oct. 24, 1944 2,393,016 Black Jan. 15, 1946 2,418,588 Le Tourneau Apr. 8, 1947 2,495,354 Spearing et al Jan. 24, 1950 2,561,211 Le Tourneau July 17, 1951 FOREIGN PATENTS Number Country Date 325,888 France May 11, 1903 

